/* * Class to manage Backends. * * Copyright (c) 2002 by Stefan Eilers (Eilers.Stefan@epost.de) * * ===================================================================== * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; * either version 2 of the License, or (at your option) any later * version. * ===================================================================== * ToDo: Use plugins * ===================================================================== * Version: $Id$ * ===================================================================== * History: * $Log$ * Revision 1.9 2003/12/22 10:19:26 eilers * Finishing implementation of sql-backend for datebook. But I have to * port the PIM datebook application to use it, before I could debug the * whole stuff. * Thus, PIM-Database backend is finished, but highly experimental. And some * parts are still generic. For instance, the "queryByExample()" methods are * not (or not fully) implemented. Todo: custom-entries not stored. * The big show stopper: matchRegExp() (needed by OpieSearch) needs regular * expression search in the database, which is not supported by sqlite ! * Therefore we need either an extended sqlite or a workaround which would * be very slow and memory consuming.. * * Revision 1.8 2003/09/22 14:31:16 eilers * Added first experimental incarnation of sql-backend for addressbook. * Some modifications to be able to compile the todo sql-backend. * A lot of changes fill follow... * * Revision 1.7 2003/08/01 12:30:16 eilers * Merging changes from BRANCH_1_0 to HEAD * * Revision 1.6.4.1 2003/06/30 14:34:19 eilers * Patches from Zecke: * Fixing and cleaning up extraMap handling * Adding d_ptr for binary compatibility in the future * * Revision 1.6 2003/04/13 18:07:10 zecke * More API doc * QString -> const QString& * QString = 0l -> QString::null * * Revision 1.5 2003/02/21 23:31:52 zecke * Add XML datebookresource * -clean up todoaccessxml header * -implement some more stuff in the oeven tester * -extend DefaultFactory to not crash and to use datebook * * -reading of OEvents is working nicely.. saving will be added * tomorrow * -fix spelling in ODateBookAcces * * Revision 1.4 2002/10/14 15:55:18 eilers * Redeactivate SQL.. ;) * * Revision 1.3 2002/10/10 17:08:58 zecke * The Cache is finally in place * I tested it with my todolist and it 'works' for 10.000 todos the hits are awesome ;) * The read ahead functionality does not make sense for XMLs backends because most of the stuff is already in memory. While using readahead on SQL makes things a lot faster.... * I still have to fully implement read ahead * This change is bic but sc * * Revision 1.2 2002/10/08 09:27:36 eilers * Fixed libopie.pro to include the new pim-API. * The SQL-Stuff is currently deactivated. Otherwise everyone who wants to * compile itself would need to install libsqlite, libopiesql... * Therefore, the backend currently uses XML only.. * * Revision 1.1 2002/10/07 17:35:01 eilers * added OBackendFactory for advanced backend access * * * ===================================================================== */ #ifndef OPIE_BACKENDFACTORY_H_ #define OPIE_BACKENDFACTORY_H_ #include <qstring.h> #include <qasciidict.h> #include <qpe/config.h> #include "otodoaccessxml.h" #include "ocontactaccessbackend_xml.h" #include "odatebookaccessbackend_xml.h" #ifdef __USE_SQL #include "otodoaccesssql.h" #include "ocontactaccessbackend_sql.h" #include "odatebookaccessbackend_sql.h" #endif class OBackendPrivate; /** * This class is our factory. It will give us the default implementations * of at least Todolist, Contacts and Datebook. In the future this class will * allow users to switch the backend with ( XML->SQLite ) without the need * to recompile.# * This class as the whole PIM Api is making use of templates * * <pre> * OTodoAccessBackend* backend = OBackEndFactory<OTodoAccessBackend>::Default("todo", QString::null ); * backend->load(); * </pre> * * @author Stefan Eilers * @version 0.1 */ template<class T> class OBackendFactory { public: OBackendFactory() {}; enum BACKENDS { TODO, CONTACT, DATE }; /** * Returns a backend implementation for backendName * @param backendName the type of the backend * @param appName will be passed on to the backend */ static T* Default( const QString backendName, const QString& appName ){ // __asm__("int3"); Config config( "pimaccess" ); config.setGroup ( backendName ); QString backend = config.readEntry( "usebackend" ); qWarning("Selected backend for %s is: %s", backendName.latin1(), backend.latin1() ); QAsciiDict<int> dict ( 3 ); dict.setAutoDelete ( TRUE ); dict.insert( "todo", new int (TODO) ); dict.insert( "contact", new int (CONTACT) ); dict.insert( "datebook", new int(DATE) ); int *find = dict[ backendName ]; if (!find ) return 0; switch ( *find ){ case TODO: #ifdef __USE_SQL if ( backend == "sql" ) return (T*) new OTodoAccessBackendSQL(""); #else if ( backend == "sql" ) qWarning ("OBackendFactory:: sql Backend for TODO not implemented! Using XML instead!"); #endif return (T*) new OTodoAccessXML( appName ); case CONTACT: #ifdef __USE_SQL if ( backend == "sql" ) return (T*) new OContactAccessBackend_SQL(""); #else if ( backend == "sql" ) qWarning ("OBackendFactory:: sql Backend for CONTACT not implemented! Using XML instead!"); #endif return (T*) new OContactAccessBackend_XML( appName ); case DATE: #ifdef __USE_SQL if ( backend == "sql" ) return (T*) new ODateBookAccessBackend_SQL(""); #else if ( backend == "sql" ) qWarning("OBackendFactory:: sql Backend for DATEBOOK not implemented! Using XML instead!"); #endif return (T*) new ODateBookAccessBackend_XML( appName ); default: return NULL; } } private: OBackendPrivate* d; }; #endif